libbb/match_fstype.c

   1 /* vi: set sw=4 ts=4: */
   2 /*
   3  * Match fstypes for use in mount unmount
   4  * We accept notmpfs,nfs but not notmpfs,nonfs
   5  * This allows us to match fstypes that start with no like so
   6  *   mount -at ,noddy
   7  *
   8  * Returns 1 for a match, otherwise 0
   9  *
  10  * Licensed under GPLv2 or later, see file LICENSE in this source tree.
  11  */
  12 #include "libbb.h"
  13
  14 int FAST_FUNC fstype_matches(const char *fstype, const char *comma_list)
  15 {
  16         int match = 1;
  17
  18         if (!comma_list)
  19                 return match;
  20
  21         if (comma_list[0] == 'n' && comma_list[1] == 'o') {
  22                 match--;
  23                 comma_list += 2;
  24         }
  25
  26         while (1) {
  27                 char *after_mnt_type = is_prefixed_with(comma_list, fstype);
  28                 if (after_mnt_type
  29                  && (*after_mnt_type == '\0' || *after_mnt_type == ',')
  30                 ) {
  31                         return match;
  32                 }
  33                 comma_list = strchr(comma_list, ',');
  34                 if (!comma_list)
  35                         break;
  36                 comma_list++;
  37         }
  38
  39         return !match;
  40 }